More than on Service account when each on has more than one role using terraform

Terraform HCP Terraform
1

Hi All,
Following is my use-case and looking for solution

variable sa_with_iam {
  type = map(object({
    display_name = string
    description = string
     roles = list(string)
}))
}

Now I will have to create multiple serviceaccount with each one having its own roles which can be more than one.
Something like

sa1 = {
 display_name = "sa1"
 description = "sa_1 description"
 roles = ["storage.admin","iam.admin"]
}
sa2 = {
 display_name = "sa2"
 description = "sa_2 description"
 roles = ["storage.read","iam.read"]
}

Following are the terraform for google_service_account and google_project_iam_member

resource "google_service_account" "service_account" {
  account_id   = "service-account-id"
  display_name = "Service Account"
}

resource "google_project_iam_member" "project" {
  project = "your-project-id"
  role    = "roles/editor"
  member  = "serviceAccount:myserviceaccount"
}

@ apparentlymart